3D TV is a TV display technique that enables a 3-dimensional effect, in order to viewers sense that an image has depth as well as height and width. what is difference between 3D TVs and LED TV. LED TV use LED back-lighting instead of fluorescent lighting, and thus they can produce images and pictures quality with a greater dynamic contrast. LED TVs are also very slim and take up minimum space. 3D TVs employ the latest technology today, allowing you to view 3 dimensional TV shows, movies and video games. 3D TV have very refresh rates so that two images can be displayed at same time